return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for SiH3OH (silanol)

using model chemistry: PBEPBEultrafine/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBEultrafine/6-31G(2df,p)
 hartrees
Energy at 0K-366.897197
Energy at 298.15K 
HF Energy-366.897197
Nuclear repulsion energy64.187910
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at PBEPBEultrafine/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3789 3750 66.54 80.45 0.27 0.42
2 A' 2195 2173 93.05 93.98 0.25 0.40
3 A' 2140 2118 87.22 150.06 0.08 0.14
4 A' 973 963 126.91 3.62 0.58 0.74
5 A' 937 928 95.73 9.12 0.73 0.85
6 A' 904 895 55.49 12.26 0.70 0.82
7 A' 824 815 116.22 7.96 0.18 0.31
8 A' 669 662 54.75 4.59 0.62 0.77
9 A" 2136 2114 158.69 57.70 0.75 0.86
10 A" 908 899 57.93 12.79 0.75 0.86
11 A" 686 679 53.20 8.42 0.75 0.86
12 A" 218 216 92.12 1.72 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8190.1 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 8105.7 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at PBEPBEultrafine/6-31G(2df,p)
ABC
2.52215 0.45457 0.44536

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.030 -0.532 0.000
O2 0.030 1.131 0.000
H3 1.470 -0.924 0.000
H4 -0.646 -1.108 1.212
H5 -0.646 -1.108 -1.212
H6 -0.844 1.545 0.000

Atom - Atom Distances (Å)
  Si1 O2 H3 H4 H5 H6
Si11.66341.49241.50241.50242.2544
O21.66342.50932.63452.63450.9679
H31.49242.50932.44572.44573.3847
H41.50242.63452.44572.42302.9241
H51.50242.63452.44572.42302.9241
H62.25440.96793.38472.92412.9241

picture of silanol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 O2 H6 115.351 O2 Si1 H3 105.210
O2 Si1 H4 112.548 O2 Si1 H5 112.548
H3 Si1 H4 109.501 H3 Si1 H5 109.501
H4 Si1 H5 107.491
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.045      
2 O -0.387      
3 H 0.027      
4 H 0.006      
5 H 0.006      
6 H 0.305      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.305 0.243 0.000 1.327
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.666 -2.755 0.000
y -2.755 -19.962 0.000
z 0.000 0.000 -21.612
Traceless
 xyz
x 1.121 -2.755 0.000
y -2.755 0.678 0.000
z 0.000 0.000 -1.799
Polar
3z2-r2-3.597
x2-y20.296
xy-2.755
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.210 -0.113 0.000
y -0.113 4.241 0.000
z 0.000 0.000 4.030


<r2> (average value of r2) Å2
<r2> 39.316
(<r2>)1/2 6.270